Picking motion for looms



llinllyfm 19249. w. M. wATTIE 1,722,831 PI'CKING MOTION Fon' Loom; v A l Filed Deo. 1, 1927 Patented July 30, 1929.

, UNITED STA'IES f maar earaisr ori-"fics, I

v `WILLIAM M. WATTIE, or WORCESTER, MASSACHUSETTS, Assrenoia 'rocnoiyrrtrouay KNOWLES LOOM WORKS, OF WORCESTER, TIIASSACHUSETTS, `A CORPORATION OFk I MASSACHUSETTS.

rrcxins MOTION ron Looivrs.

Application filed December 1, `1927. Serial No. 237,086.

This invention relates to improvements in picking motions for looms and it is the gen.-l eral object of the invention to improve the construction of picking motions to the end 5 that the picking shaft maybe readily removed from the loom and replaced so as to have its `original setting.

It is a further object of my invention to provide a picking shaft with an adjusting vcollar which not only limits endwise movement of the shaft in one direction and limits angular movement in another direction, but also affords means` for-adjusting the angular position of the shaft so that the picking `cam may be varied with respect to the picking arm which moves with the bottom shaft of the loom. s'

It is a still further object of the invention to provide any improved form of bearingk for picking shafts constructed with blocksrthat the blocks may be readily replaced or adjusted without disturbing the setting lof the bearing brackets which support said blocks.

Y With these and other objects in view which `will appearvas the description proceeds,l my invention resides in the combination and arrangement of parts hereinafter described and set forth in the claims. Y j

In the accompanying drawings wherein one form of my invention is shown,

Fig. 1 is a vertical section through a loom showing my improved picking shaft inthe position itassumesf at the beginning of a pick- ,ing'stroke, v

Fig. 2 is a vertical section on line 2 2 of Fig. 1' showing the picker stick and its connections, Y y Y M Y,

Fig. 3 is an enlarged vertical section on line 3-3 of Fig. l, and

Fig. 4 is a vertical section ,Fig 3. i i Y A Referring to the drawings, the loom frame 'A10-is provided with upper'and lower bearings 11 and 12, respectively, for the top and bottom shafts 13 and14, respectively. The bottom shaft haskeyed thereto a picking arm 15 provided with Va picking ball 16which rotates freely about a stud y12' fastened tothe on line 4 4 of picking arm 15. Under normal conditions Y 4rtwo picks of the loom.A Thev picker stick 18 is pivoted as at 19 to the rocker arm 20 supportedin the usual manner by the rocker pin 21. A tension spring 22 having the' left vthe shuttle across end as viewed in Fig. 2secured to the rocker shaft in a manner not shown but usual has the righthand end secured to the bottom of the picker stick to the right as shown in Fig. 2. The matter thus far described is of common construction and it has gone into very general use heretofore and forms no part of v.

my present invention. n carrying my present improvements into. effect I provide a hollow round picking shaft 30 which may be made of heavy` piping stock, if desired. A power arm 31 with a hub 32is secured tosaid shaft 30 to move angularl therewith, said power arm being attached by means of the lug strap 33 to the picker stick 18 so that as the shaft 30 rocks in afcounterclockwise directionwas shown in Fig.fl2,said picker stick wil be moved inwardly to propel y to the left hand side of the loom.. l 1 1. A picking shoe 34 secured to the shaft30 has a cam face' 35 positionedto engage they roll 16 and Cause oscillationE of the picking shaft. Said picker shoe may have one side of the hub ,36 thereofsplit so that the same may be clampedto the shaft by means of bolts 37. f

Each end of the picker shaft 30 is supportfrom the body o f the cap 44. As shown in Fig. 4 the bracket 38 is provided with a pocket 47 defined by walls 48 which are on the sides of lthe bracket andalso wall 49'formed as part of thebracket 38. The u'pper'end of wall 49 is curved as at 50 to form one half of the-upper portion of the'bearingfor the shaft 30, while the cap 44 is also provided with a curved portion 5 1 which forms the other half of the upper lpart of. the bearing for ysaid shaft. The shaft' rests, on a wooden block 52 located inthe pocket 47 and held therein 'by the front wall i -53 of thehinged cap 44. .,The front wall53 cik ed by means of a bearing and as these bearings l .are substantially the same a description of together withthe walls 48 and 49 provide a substantially closed compartmentfin 'which said block 5,2 is located. The upper end of the n the shaft 30 adjacent the left hand end as' viewed'in Fig. 1K.V Said collar is adjustably mounted yfor angular movementaround the shaft by-means of 'a set screw'57V and thc collar is provided with an upper finger or lug 58 which engages the bracket bearing 3,8. vThe collar .also 'carries asecond'lower finger 59 which engages the wall 53 ofthe hinged bearling cap' 44; Longitudinal movementof the shaft vto the right'is restricted bymeansofthe cross girt l `which is secured to the loom l framelO andhas a vertical wall 61 positioned y to 4engage the right 'end of ther-shaft 3() as shown in Fig. 1.

When the 'picking motion is at rest the spring 23 acting through the Vpicker stick, lug strapand picker arm Slwill hold the shaft 30 in the position shown in Fig. 2 with the'lug or finger "58'limiting movement of said shaft. The lug therefore determines the position of-the Vcam faceA 35 and whenit lis desired to f fraise or lower saidface relatively tothe path inwrhiclrthe'ball 16 rotates 'the set screw 57 may be loosened and the collar56 moved angularly relatively `to the shaft, the direction Y of movement depending upon whether the cam facc'is to ybe raised or lowered. During thev voperation of the loom the picking ball will engagethe surface 35 to rock the shaft 30 in its Y bearings in counter-clockwise direction as viewed in Fig. 3 and excess movement ofthe shaft will be arrested by engagement of the finger 59 with the cap 44. I ndit desirable tofernploy means to limit movement of the shaft 30 in a counter-clockwise direction in case the connections with' the picker stick should become broken or unduly loose. Under these conditions it has been found heretofore'insomc constructions of looms that cer tain parts carried; by the picking shaft will fall. intothe pathof regularly moving parts of the loom, such as the lay, and'rbedamaged.

Whenit is desired to remove the shaft 30 it y is necessary merely torelease the bolts'42 and throwtliem upwardly aroundvpins al as a center, l after which the vhinged bearings '44 can rbe'swung away frointhe bracket bearings and lthe shaft removed. vIn this way gthe 'picker shaft --canl be `quickly replaced without -dis- 'turhingthe settings of the 'bearings therefor and fby means ofthe adjusting serewsthe 'blocks 52imay`be moved-upwardly to'be kept '1n preper'positon andprevent vibration of the shaft. f Y l 'From the :foregoing'it ywill be seen .that I have provided a picking motioncwherein the picking shaft may be very conveniently and 4easily removed, a portion of the bearings .adyjacent each-end ofthe picker shaft remaining always infiXed position relatively tothe loom. It will further be seen thatgtheblocks 52 are Vconfined-in a compartment defined by the venting endwise movement of the'pickerlshaft in one ,directicnbut also affordsmeans for adjusting the position of the cam face 35 relatively to the picking ball y16 and furthermore limits angular movement of the'shaft and the members carried thereby shouldthe connections 'for the pickerv stick become brokenvor slack. Also, the end thrust of the shaft 30 unf der action ofthe picking ballis absorbed by the cross-gift, a relativelyV strongI and immovable part/of lthe loomffraine. p j f 'Having'thus described my invention it will be seen that changes'and modifications may be made therein lby those fskillediin the art without departing fromthe spirit andscope of theinvention and-I do notwish'to belimited'to the details herein' disclosedfbut what I'claimis: 1

' 11.l In a picking motion for aleemhavin-,gy a frame, a pairof spaced aligned bearings Von the frame, al shaft supportedibyandrotavtablelwith lrespect to the bearings, a power arm secured to Vthe shaft, f if":king "mechanism connected to the'powe'r arm-,collar angularly adjustable on the shaft, andinterengaging stop connectionsbetwen the collar andone Vof the bearings to-llimit Aangular movement of'the shaft in two oppositedirections.

2,"In a picking motion fora loornfhaving a frame,'a pair of'spacedalignedbearings `on the frame, a shaft supportedfby and ro Vtatable with 'respectto the bearingsfa power Varm secured tothe shaft, picking mechanism connected to the power arm, a collar-anguylarly adjustable on'the shaftgfandlintereengaging .stop connectionsbetweenthe collar and one of theV bearings to limit-'angular movement of the shaft intwov oppositeffdi- 'rections, said collar being in vengag'ement with the last named: bearing yto limit( longitudinal movement ofthe shaft'in one vdirerztion.'

3. Inra-picking motion vfer -alom havingfZ za fir-aine and arotating picking" arm", a pair of spaced aligned bearings supportedfbythe frame, la shaft supported bydandfrotatable in 4the bearings, a Vcam s-'eniredfto"theshaft-"toI cooperate with thev picking AVarm, a cellar .-secured toV and angularly adj `ustable with Yrelspect to -the shaft, and inter-engafgingstop 'connections `l-)etw'een 'the collar and Y n'e *of YLthebearings tolimit angulamcvenient f l 0 .the v shaft'. in Y Pposipte directions.

4. In a picking motion for a loom having a frame and a rotating picking arm, a pair of spaced aligned bearings supported by the frame, a Shaft supported by and rotatable in the bearings, a cam secured to the shaft to cooperate with the picking arm, a collar secured to and angularly adjustable with respect to the shaft, and inter-engaging stop connections between the collar and one of the bearings to limit angular movement of the shaft in opposite directions, said collar `engaging the adjacent bearing to limit end movement of the shaft in one direction.

5. In a picking motion for a loom having a frame and a rot-atingpicking arm, a pair of spaced aligned bearings, a shaft supported by and rotatable in the bearings, a cam sef cur-ed to the shaft and located for cooperation With the picking arm and having an inclined portion extending in the general direction of the length of the shaft7 and a girt secured to the frame and forming a part of the latter and positioned for direct engagement With the shaft to limit longitudinal movement of theshaft in one direction.

6. In a picking motionl for a loom having a frame and a rotating picking arm, a pair gagement With the picker shaft to restrain` longitudinal movement of said end of the shaft when the latter tends to move in an endvvise direction under influence of the picker arm when engaging the inclined face of the cam.

In testimony whereof I have hereunto axed my signature.

WILLIAM M. WATTIE. 

